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Finding the Fourth Proportional to 428,771.54, 642,993.82 and 144,385.73

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Solution

The fourth proportional to 428,771.54, 642,993.82 and 144,385.73 is: 216,523.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,771.54 : 642,993.82 = 144,385.73 : x
  2. Step 2: Convert to fraction form
    428,771.54/642,993.82 = 144,385.73/x
  3. Step 3: Cross multiply
    428,771.54x = 642,993.82 × 144,385.73
  4. Step 4: Simplify right side
    428,771.54x = 92,839,132,865.26
  5. Step 5: Solve for x
    x = 92,839,132,865.26/428,771.54
  6. Step 6: Final answer
    x = 216,523.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.